Computing with text-graphic forms
Computing with text-graphic forms
复制标题
以文本图形形式进行计算
DOI：
10.1145/800087.802795
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
Fred Lakin
中科院分区：
文献类型：
--
作者：
Fred Lakin
当使用文本图形模式来指导其他文本图形模式的处理时，就会发生使用文本图形形式的计算。PAM图形系统就是为这种计算而设计的；PAM代表PAttern manipulation——PAM是LISP （McCarthy[0]）的一种概括，从使用（文本）符号表达式进行计算到使用文本-图形形式进行计算。
Computing with text-graphic forms occurs when text-graphic patterns are used to direct the processing of other text-graphic patterns. The PAM graphics system was designed for just this kind of computation; PAM stands for PAttern Manipulating—PAM is a generalization of LISP (McCarthy [0]) from computing with (textual) symbolic expressions to computing with text-graphic forms.
Like LISP, PAM acheives processing power by providing atomic objects, means of structuring them into complex objects and taking them apart, and equality tests for objects. Text-graphic engines can then be defined, allowing text editors, text-graphic editors, circuit design aids and visual language processors to all be developed in the same LISP-like environment. Examples discussed in the paper are:
handPAM is an agile environment for the manual manipulation of text-graphic objects (described briefly).
writtenPAM provides programmatic manipulation of visual objects. Pattern processing is demonstrated by functions which translate a LISP sexpr to the visual name-shape synonyms of the OUTLINE notation system, and then spatially lay it out. writtenPAM also permits definition of pattern evaluating, enabling actual computation with text-graphic forms. An evaluate function for text-graphic objects is given which can execute OUTLINE expressions.
An experimental version of the PAM system has been implemented in MACLISP at the Stanford Artificial Intelligence Lab.